The Federal Trade Commission is investigating whether OpenAI’s ChatGPT artificial-intelligence system has harmed individuals by publishing false information about them, according to a letter the agency sent to the company. WSJ: The letter, reported earlier by The Washington Post and confirmed by a person familiar with the matter, also asked detailed questions about the company’s data-security practices, citing a 2020 incident in which the company disclosed a bug that allowed users to see information about other users’ chats and some payment-related information.